Calculating Scrolling GameObject x position scrolling pass another GameObject x postion (2D Game)

Questions & Answers
1

I would appreciate any help that can be provided as the reason this code isn’t working doesn’t make sense to me.

I have a collection/array of obstacles that are moving across the screen (x position) from right to left. I have a player/ship that is located on the left side of the screen.

I would like to kick off a method once one of the obstacles have passed the ship. When I run my code the function kicks off before the object even makes it to the middle of the screen. I don’t understand why this is happening.

My code is as follows:

void Update () 
{
    CheckObstaclePosition();
}


void CheckObstaclePosition() 
{
  Obstacles[] obstaclesIns;
  Obstacles currObstacle; 

  obstaclesIns = FindObjectsOfType();

  if (obstaclesIns.Length > 0) 
     {
        currObstacle = obstaclesIns[0];
        currObstacleVector = currObstacle.transform.position;
        currShipVector = this.gameObject.transform.position;
        
        currObstaclePos = currObstacleVector.x;
        currShipPos = currShipVector.x - 0.2f;
           
        if (currObstaclePos < currShipPos)
           {
                Debug.Log("Obstacle passed Ship");
                AnimateExplosion();  
                currObstacle.DestroyObstacle();
            }

     }

Can someone explain why this behavior is happening and why the x position of the obstacle is showing that it is passing the ship before it even gets close to the middle of the screen let alone actually getting pass the ship.

2

First, you’re don’t have any “type” specified in your FindObjectsOfType command. I haven’t seen this before, but I’m guessing it’s just finding all objects in your scene perhaps? And then testing one that you didn’t intend to test against.

So you need a better way of identifying your list of “obstacles”. You could give them all a tag, and use GameObject.FindGameObjectsWithTag, or you could attach them all to a parent object, and enumerate through that object’s childre,

Second, in your code, you’re not checking each obstacle in your list of obstacles - only the 1st (item 0) because of your code which says: obstaclesIns[0]. You haven’t set up a loop to check through each obstacle in the list.

You need to look up “for loops” or "foreach loops"and how to use them.